Method of blasting earth



(No Model.)

H. H. BOURNE. METHOD OF BLAS'TING EARTH.

Patented Oct. 11, 1887. f Y

x i g iNVENTOR:

BY VLLMW ATTORNEYS.

UNITED ,STATEs PATENT OFFICE.

HENRY H. BOURNE, OF MANHATTAN, KANSAS.

METHOD OF BLASTING' EARTH.

SPECIFICATION forming part of Letters Patent No. 371,298, dated October 11, 188?.

Application filed December 11, 1880. Serial No. 221,322. (No model.)

.To all whom it may concern} Y Be it known that I, HENRY H. BOURNE, of Manhattan, in the county of Riley and State of Kansas, have invented a new and Improved Method of Blasting Earth, of which the fol- Reference is to be had to the accompanying drawings, forming apart of'this specification,

place.

in which similar figures of reference indicate corresponding partsin all the views.

Figure .1 is e vertical sectional View of a bank, representing the same as it appears at ter thefirst step of my improved method of blasting earth has been takenev-tnat is, after the dynamite-cartridge has, been lowered to Fig. 2 is a similar view representing the bank as it appears after the second step has been taken. Fig. 3 is a view representing the parts as-they appear after the tube carrying the rubber pouch has been lowered. to place and the fuse has been adjusted to po sition. Fig. 4 represents the pouch as it appears after having been filled with the ex-plo sive; and Fig. 5 represents the charge within the lower cavity, the filling-tube having been withdrawn.

In carrying out my invention I bore or drill a hole, 2, in the bank at a proper distance from the edge. In the hole, so formed I insert a filling-tube, 3, which is formed with a funnel shaped mouth, 4, and provided witha collar, 5, which is arranged to be clamped to the tubeby means 'of a set-screw, 6. After the tube has been lowered to the bottom of the hole 2 it is drawn upward a short distance, and the collar 5 is clamped to the tube in order that said tube maybe held in its raised position. A dynamite-cartridge, 7, -is then lowered to the bottom of the hole- 2 and exploded, thereby forming a chamber, as 8. The tube 2 is then withdrawn, and a rubber 5o pouch, 9, is secured to its lower end, after claim as new and desire ing the explosive,

which the pouch and the tube are returned to the position in which they are shown in Fig. ,3.

The fuse that is to be employed to explode the material which is to be placed within the pouch 9 is shown at 10, the lower end of the said fuse being attached to a weight, 11, that is lowered so as to carry the fuse within the pouch 9. After the fuse has been lowered to place, an explosive material, preferably gunpowder, is poured in the funnel-shaped mouth 4 ofthe'tube 3, passingdownward into the pouch 9, and after a proper charge of powder has been so delivered to the pouch a packing or filling of hydraulic cement, 12, is forced downward into the tube 3, which tube is then withdrawn, thereby permitting the mouth of the rubber pouch to close about the cement and prevent the entrance of any water which may be contained within the cavity 8.

When the parts have. been arranged as described, the fuse 10 is ignited and the contents of the pouch' exploded. f

This method of blasting earth may beemployed for the purpose of forming cisterns or storage-receptacles.

' Having thus fully described myinvention, I to secure by-Letters Patent- 1. The herein-described method of blasting earth, which consists in boring a hole of proper depth, exploding a cartridge at the lower end of the hole, inserting a tube carrying a water-proof pouch through the tube upon its lower end, filling said pouch-with a proper' explosive, withdrawing the tube, and explodsubstantially as described. 2.v The-herein -de'scribed method of blasting, which consists in boring a hole and enlarging it at its: innerend, then inserting a tube having a detachable water-proof pouch on its end into the hole until the pouch is within theenlargement, then passing an explosive through the tube into the pouch, then filling the pouch through the tube above the explosive with a packing, then withdrawing the tube from the pouch and hole and exploding the charge, substantially as set forth.

3. The herein-described method of blasting, which consistsin boring a hole and enlarging it at its inner end, then inserting a tube having ndetachable elastic water-proof pouch on its end into the hole until the pouch is within the enlargement, then passing the explosive through the tube into the pouch, passing a packing through the tube into the end of the pouch above the explosive, then withdrawing the tube from the pouch and hole, the mouth of the pouch closing about the packing, and finally exploding the charge, substantially as set forth.

4. The method of blasting which consists in boring a hole and enlarging its lower end, then passing a tube having a detachable elastie waterproof pouch on its end into the hole until the pouch is withinthe enlargement, then fillingthe pouch through the tube with explosive until the pouch has expanded to a greater diameter than the bore of the hole,

then inserting a packing of hydraulic cement througlrthe tube upon the explosive, then Withdrawing the tube to allow the open end of the pouch to close upon the cement by contracting,and finally exploding the charge, substantially as set forth,

l-IENRY H. ROU'RNE.

\Vitne'sses:

F. R. SPoUsLER, AUG, BEACHAM. 

